Hi,
I'm a new FS user just trying to run through the tutorials. In the Group Analysis tutorial, doing the multiple comparisons correction, when I run mri_flmfit-sim I get a malloc() memory corruption error. The output is below. I am running the VirtualBox Xubuntu 12.04 Freesurfer 5.3.0 version on a PC with 64-bit Windows 7 and 3472 MB of RAM (assigning more RAM than that causes the VirtualBox to crash). I setup a shared folder on my E: drive to store the buckner tutorial data. Had to add fsuser to vboxsf using usermod to be able to access the data from xubuntu. Also can't setup symbolic links on a shared folder so I had to copy the fsaverage dataset to the E: drive. Not sure if that is a good way to set things up but I couldn't find much guidance on the best way to do this.  Found lots of mailing list threads related to this error, but none of them actually seem to provide a solution. Any help would be appreciated.

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mri_glmfit-sim \
> --glmdir lh.gender_age.glmdir \
> --cache 4 neg \
> --cwpvalthresh 0.05 \
> --2spaces
cmdline mri_glmfit --y lh.gender_age.thickness.10.mgh --fsgd gender_age.fsgd dods --C lh-Avg-thickness-age-Cor.mtx --surf fsaverage lh --cortex --glmdir lh.gender_age.glmdir
SURFACE: fsaverage lh
log file is lh.gender_age.glmdir/cache.mri_glmfit-sim.log

cd /media/sf_Data/tutorial_data/buckner_data/tutorial_subjs/group_analysis_tutorial/glm
/usr/local/freesurfer/bin/mri_glmfit-sim
--glmdir lh.gender_age.glmdir --cache 4 neg --cwpvalthresh 0.05 --2spaces

$Id: mri_glmfit-sim,v 1.36.2.5 2012/10/01 22:31:37 greve Exp $
Wed Nov 18 13:15:50 EST 2015
Linux xubuntu-VirtualBox 3.2.0-23-generic #36-Ubuntu SMP Tue Apr 10 20:41:14 UTC 2012 i686 i686 i386 GNU/Linux
fsuser
setenv SUBJECTS_DIR /media/sf_Data/tutorial_data/buckner_data/tutorial_subjs/group_analysis_tutorial
FREESURFER_HOME /usr/local/freesurfer

Original mri_glmfit command line:
cmdline mri_glmfit --y lh.gender_age.thickness.10.mgh --fsgd gender_age.fsgd dods --C lh-Avg-thickness-age-Cor.mtx --surf fsaverage lh --cortex --glmdir lh.gender_age.glmdir

DoSim = 0
UseCache = 1
DoPoll = 0
DoPBSubmit = 0
DoBackground = 0
DiagCluster = 0
gd2mtx = dods
fwhm = 13.914377
CSD /usr/local/freesurfer/average/mult-comp-cor/fsaverage/lh/cortex/fwhm14/neg/th40/mc-z.csd
mri_surfcluster --in lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/sig.mgh --csd /usr/local/freesurfer/average/mult-comp-cor/fsaverage/lh/cortex/fwhm14/neg/th40/mc-z.csd --mask lh.gender_age.glmdir/mask.mgh --cwsig lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/cache.th40.neg.sig.cluster.mgh --vwsig lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/cache.th40.neg.sig.voxel.mgh --sum lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/cache.th40.neg.sig.cluster.summary --ocn lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/cache.th40.neg.sig.ocn.mgh --oannot lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/cache.th40.neg.sig.ocn.annot --annot aparc --csdpdf lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/cache.th40.neg.pdf.dat --cwpvalthresh 0.05 --o lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/cache.th40.neg.sig.masked.mgh --no-fixmni --bonferroni 2 --surf white
Creating CDFs from CSD files
csd->threshsign = -1
thsign = neg, id = -1
version $Id: mri_surfcluster.c,v 1.51.2.3 2012/05/31 22:10:05 greve Exp $
hemi           = lh
srcid          = lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/sig.mgh
srcsubjid      = fsaverage
srcsurf        = white
srcframe       = 0
thsign         = neg
thmin          = 4
thmax          = -1
fdr            = -1
minarea        = 0
Bonferroni      = 2
xfmfile        = talairach.xfm
nth         = -1
outid    = lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/cache.th40.neg.sig.masked.mgh MGH
ocnid    = lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/cache.th40.neg.sig.ocn.mgh MGH
sumfile  = lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/cache.th40.neg.sig.cluster.summary
subjectsdir    = /media/sf_Data/tutorial_data/buckner_data/tutorial_subjs/group_analysis_tutorial
FixMNI = 0
Found 149953 vertices in mask
Found 149953 vertices in mask
Found 149953 points in clabel.
------------- XFM matrix (RAS2RAS) ---------------
/media/sf_Data/tutorial_data/buckner_data/tutorial_subjs/group_analysis_tutorial/fsaverage/mri/transforms/talairach.xfm
 1.000   0.000   0.000   0.000;
 0.000   1.000   0.000   0.000;
 0.000   0.000   1.000   0.000;
 0.000   0.000   0.000   1.000;
----------------------------------------------------
Reading source surface /media/sf_Data/tutorial_data/buckner_data/tutorial_subjs/group_analysis_tutorial/fsaverage/surf/lh.white
Done reading source surface
Reading annotation /media/sf_Data/tutorial_data/buckner_data/tutorial_subjs/group_analysis_tutorial/fsaverage/label/lh.aparc.annot
reading colortable from annotation file...
colortable with 36 entries read (originally /autofs/space/terrier_001/users/nicks/freesurfer/average/colortable_desikan_killiany.txt)
Computing metric properties
Loading source values
number of voxels in search space = 149953
Done loading source values (nvtxs = 163842)
overall max = 3.62547 at vertex 153106
overall min = -11.4482 at vertex 134036
surface nvertices 163842
surface area 65417.097656
surface area 65416.648438
Computing voxel-wise significance
CSDpvalMaxSigMap(): found 94908/163842 above 0
Adjusting threshold for 1-tailed test.
If the input is not a -log10(p) volume, re-run with --no-adjust.
Searching for Clusters ...
thmin=4.000000 (3.698970), thmax=-1.000000 (-1), thsignid=-1, minarea=0.000000
Found 32 clusters
Max cluster size 7917.266602
Pruning by CW P-Value 0.05
Saving thresholded output to  lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/cache.th40.neg.sig.masked.mgh
Saving cluster numbers to lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/cache.th40.neg.sig.ocn.mgh
Saving cluster pval lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/cache.th40.neg.sig.cluster.mgh
Constructing output annotation
Writing annotation lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/cache.th40.neg.sig.ocn.annot
mri_segstats --seg lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/cache.th40.neg.sig.ocn.mgh --exclude 0 --i /media/sf_Data/tutorial_data/buckner_data/tutorial_subjs/group_analysis_tutorial/glm/lh.gender_age.thickness.10.mgh --avgwf lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/cache.th40.neg.y.ocn.dat --sum /tmp/mri_glmfit-sim.junk.4706

$Id: mri_segstats.c,v 1.75.2.9 2013/02/16 00:09:33 greve Exp $
cwd
cmdline mri_segstats --seg lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/cache.th40.neg.sig.ocn.mgh --exclude 0 --i /media/sf_Data/tutorial_data/buckner_data/tutorial_subjs/group_analysis_tutorial/glm/lh.gender_age.thickness.10.mgh --avgwf lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/cache.th40.neg.y.ocn.dat --sum /tmp/mri_glmfit-sim.junk.4706
sysname  Linux
hostname xubuntu-VirtualBox
machine  i686
user     fsuser
UseRobust  0
Loading lh.gender_age.glmdir/lh-Avg-thickness-age-Cor/cache.th40.neg.sig.ocn.mgh
Loading /media/sf_Data/tutorial_data/buckner_data/tutorial_subjs/group_analysis_tutorial/glm/lh.gender_age.thickness.10.mgh
Voxel Volume is 1 mm^3
Generating list of segmentation ids
Found  22 segmentations
Computing statistics for each segmentation
  1     1                                       8074    8074.000
  2     2                                      17658   17658.000
  3     3                                       3247    3247.000
  4     4                                        388     388.000
  5     5                                       2404    2404.000
  6     6                                       1596    1596.000
  7     7                                        911     911.000
  8     8                                        937     937.000
  9     9                                        450     450.000
 10    10                                       1002    1002.000
 11    11                                       1084    1084.000
 12    12                                       1010    1010.000
 13    13                                        451     451.000
 14    14                                        483     483.000
 15    15                                        441     441.000
 16    16                                        565     565.000
 17    17                                        246     246.000
 18    18                                        184     184.000
 19    19                                        235     235.000
 20    20                                        386     386.000
 21    21                                        203     203.000

Reporting on  21 segmentations
Computing spatial average of each frame
  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19
 20*** glibc detected *** mri_segstats: malloc(): memory corruption: 0x2e90cb88 ***
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